I’m a huge fan of rocket stoves; once you understand the concept you can make a rocket stove out of so many things. This particular video shows how to make a simple one from bricks. I would like to mention two potential explosion cautions here:
1) The best bricks to use for this purpose would be “fire bricks” as they are meant to deal with the heat (other bricks might explode or simply deteriorate), and…
2) Do not use bricks that were recently rained on or immersed in water as they have the potential (I think) to explode if heated too quickly when wet… it’s the same idea as to not heat rocks that may have retained water.
[Note: This video was not made by the editor of RTS.]